Regensburg 2016 – wissenschaftliches Programm
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SOE: Fachverband Physik sozio-ökonomischer Systeme
SOE 4: Traffic, Urban and Regional Systems
SOE 4.3: Vortrag
Montag, 7. März 2016, 12:00–12:15, H36
Urban scaling observed in Japanese telephone book data — •Takaaki Ohnishi1,2, Takayuki Mizuno3,2, Chihiro Shimizu2, and Tsutomu Watanabe4,2 — 1Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan — 2The Canon Institute for Global Studies, Tokyo, Japan — 3Information and Society Research Division, National Institute of Informatics, Tokyo, Japan — 4Graduate School of Economics, The University of Tokyo, Tokyo, Japan
How different urban properties (such as number of hospitals, shops, patents, and crimes) depend on city size? It has been demonstrated that most urban properties Y follow the allometric scaling law Y∝ Nβ, where N and β are population size of a city and the scaling exponent. Urban infrastructure has been shown to scale sub-linearly (β<1) reflecting large cities don’t need large infrastructure, whereas output and income have been shown to scale super-linearly (β>1) reflecting high per capita in large cities. We empirically analyze urban scaling observed in Japanese telephone book data. This data are renewed every 4 months, offering comprehensive latest address info on nearly all shops, firms, hospitals, schools, parks, etc on a nationwide scale. These urban properties are divided into 332 categories depending on the urban role. This allows us to study and discuss systematically the scaling exponent that are associated with various aspects of urban properties. We show that obtained scaling exponents help to characterize urban properties.